Enhanced Barrier Performance

Pre-Treatment of Polymer Films for Enhanced Nucleation of Thin Film Barrier Layers

Basic polymer film surfaces are less than ideal for high barrier applications. There are two principal reasons for this. First, contamination caused by additives in the film resin (and other sources of contamination) impede nucleation of the deposited barrier layer (aluminum, aluminum oxide, silicon oxide, etc.). Second, chemistry of the film surface lacks functional groups required for optimum reactivity with the film surface. Plasma pre-treatment works to both etch, or clean, the surface of the film and "functionalize" the surface to increase nucleation sites and promote adhesion.

Untreated BOPP

5.7 Nanometers Average Thickness

Treated BOPP

5.4 Nanometers Average Thickness. Vacuum plasma treatment results in a higher density of nucleation sites, which results in significantly improved barrier performance and layer adhesion.

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2.5 meter wide vacuum plasma treater capable of operating speeds in excess of 800 meters per minute with controlled flow of up to 2 reactive gasses.

2.5 meter wide vacuum plasma treater capable of operating speeds in excess of 800 meters per minute with controlled flow of up to 2 reactive gasses.

Sigma supplies the most effective and technologically advanced vacuum plasma treatment systems for pre- and post-treatment of a wide range of polymer films, paper, and synthetic fabrics.  Sigma's patented vacuum plasma reactor incorporates a unique dual hollow cathode, reverse magnetron, design that directs linear plasma beams directly onto the film surface. The result is an intense plasma that allows for high speed and efficient operation in a small form factor design that can be retrofitted into almost any existing vacuum coater. Follow the link below to begin the quotation process.